Layer-coded data transmitting apparatus

Abstract

When one-video program data (layer-coded data) of a plurality of layers is transmitted in a single channel, a video signal is layer-coded in an MPEG system, the layer-coded ES (Elementary Stream) data is converted to a PES (Packetized Elementary Stream) for each layer, and the PES is then converted to a RTP (Real-Time Protocol) packet, which is then converted to a UDP (User Datagram Protocol). An identifier is then annexed to a UDP packet data for each layer to form an IP (Internet Protocol) packet.

What is claimed is:  
     
       1. A layer-coded data transmitting apparatus for transmitting layer-coded data in a single channel, comprising: 
       means for dividing into low and high frequency component data each of intra-encoded image data (I frame data), prediction-encoded image data (P frame data), and bidirectional prediction-encoded image data (B frame data), which a video signal compressing/encoding system prescribes; and for forming an internet protocol (IP) packet which transmits only each of the low and high frequency component data of each of the I, P and B frames; and  
       means for transmitting the respective IP packets.  
     
     
       2. A layer-coded data transmitting apparatus for transmitting layer-coded data in a single channel, comprising: 
       means for dividing into low and high frequency component data each of intra-encoded image data (I frame data), prediction-encoded image data (P frame data), and bidirectional prediction-encoded image data (B frame data), which a video signal compressing/encoding system prescribes; and  
       means for transmitting in different packets the respective low and high frequency component data of each of the I, P and B frame data.